Faraday's & Lenz's Law of Electromagnetic Induction, Induced EMF, Magnetic Flux, Transformers
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- เผยแพร่เมื่อ 29 ก.ย. 2024
- This physics video tutorial explains the concept behind Faraday's Law of Electromagnetic Induction and Lenz's Law using the Right Hand Rule to determine the direction of the induced current and induced emf. Topics such as magnetic flux, self inductance of a solenoid, transformers, and ac generators are also included. This video contains plenty of examples and practice problems.
Magnetism - Review:
• Magnetism, Magnetic Fi...
Faraday's Law of Electromagnetic Induction:
• Faraday's Law of Elect...
Lenz's Law - Induced Current:
• Lenz's Law, Right Hand...
Induced EMF In Moving Conductor:
• Induced EMF In Moving ...
Electric Generators & Induced EMF:
• Electric Generators, I...
______________________________
Counter EMF of DC Motors:
• Back EMF & Counter EMF...
Transformers - Physics Problems:
• Transformers Physics P...
Mutual Inductance & Solenoids:
• Mutual Inductance & So...
Self-Inductance of Inductors & Coils:
• Self Inductance of Ind...
How To Make an Electromagnet:
• How To Make an Electro...
_________________________________
Faraday's & Lenz's Law of Electromagnetic Induction:
• Faraday's & Lenz's Law...
Energy Stored In an Inductor:
• Energy Stored In an In...
RL Circuits - Inductors & Resistors:
• RL Circuits - Inductor...
Final Exams and Video Playlists:
www.video-tuto...
Full-Length Videos and Worksheets:
/ collections
Here is a list of topics:
1. Faraday's Law of Electromagnetic Induction
2. Lenz's Law Explained - Right Hand Rule
3. Induced EMF & Magnetic Flux - Magnetic Field & Area of Coil
4. Induced EMF in a Rotating Coil
5. Induced Current & Electric Fields
6. Induced EMF, Voltage, Current & Resistance - Ohm's Law
7. Induced EMF in a Moving Straight Wire
8. Clockwise vs Counterclockwise induced current direction
9. Weber - Unit of Magnetic Flux
10. Moving Conductor, Induced EMF, Speed / Velocity & Magnetic Field
11. Increasing & Decreasing Currents & Induced Current
12. Induced EMF of AC Electric Generator - Angular Velocity, Loops / Number of Turns, Frequency
13. Transformers Step up and Step Down
14. Primary Turns and Secondary Coils
15. Primary Voltage, Secondary Current, & Electric Power
16. Self Inductance of a Solenoid
17. Energy Stored in a Magnetic Field
18. Energy Stored in an Inductor
19. Energy Density of a Magnetic Field
Disclaimer: Some of the links associated with this video may generate affiliate commissions on my behalf. As an amazon associate, I earn from qualifying purchases that you may make through such affiliate links.
Final Exams and Video Playlists: www.video-tutor.net/
Full-Length Videos & Worksheets: www.patreon.com/MathScienceTutor/collections
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engineering
@@isaacjoseph7865 yeah, freshmen engineering is calc1-3 and above, Calculus-based physics 1-2, chemistry 1-2 depending, etc. His channel is called organic chemistry tutor so I assume he did something more chemistry-based, but engineering covers all of these topics he makes videos on.
also wtf both of yall are named isaac
He must have prepared for IIT jee advance
@@kriti4698 cant you identify accent? He is not an indian
If you're reading this and my comment is over 24 hours old, it is done. The exam has occurred. I survived. You will too.
76 dislikes are teachers who hate you for making the topic easy for us to understand
Bro fr
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The haters are teachers who thought they'd foil the plans of students whos plan is to pass the class lol.
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i love your videos man, keep the good work ! physics 2 is my hardest class and you doing better job at explaining these concepts with these videos here!
Support this man by purchasing his stuffs as thank you. What a genius!
very brilliant way to make us under stand easily! I wish you keep this.
i am right hand rulling this video so that the current goes up! :D
Awesome I really enjoying watching your lectures am not used to feel stress or boring as in class when teacher talk too much. For are really teacher who any students required for his or her future professional.
Bro you are totally awesome . Recently I have watched your condensed formula in organic chemistry, it was easy for me to understand. Thanks bro
What are those condensed formulas Mr!?
thank you so much for not removing or reducing information from this video, this has been so helpful and you really don't know how much we love you (especially freaks like me who are terrible at mathematics and physics)
Never thought I would be one of those guys but I am in fact watching this at 10:30 the night before a midterm
ur teaching is absolutely genius!
Liked and subscribed for teaching better than my physics prof
Thank you for your Physics videos. I really couldn't find better problem solutions when i looked it for in my main language. So i showed you my appreciation with like and subscribe.(And my poor English :D )
Arigatou!!!! Organic chemistry dude
Totally awesome.
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We love you man!
28.10 i don't know but i think the graph that you first drew should have been in the opposite way because like this the two of them are equal but they should be opposing to each other because the initial current is trying to increase the flux so if the induced current wants to decrease it it should move in the opposite direction(CORRECT ME OF AM WRONG)
Needed the CC button for this one
:( me too
Here is a way to never forget the X and the • directions. So imagine an arrow. If the arrow is going away from you, you can see only its feathers so it looks like an X and if the arrow is coming into you, you can see only its tip so if looks like a • . Easy.
Nice explanation
You're my hero
this is so amazing thank you so much🙏
Just before 42:06 we use calculated voltage and observed current to calculate resistance, but doesn't the coil have reactance that needs to be considered?The magnetic field is changing so why isn't the term impedance used rather than resistance? Or is impedence only applicable when the voltage source is external, rather than magnetically induced current in a coil?
The magnetic flux is written with the Greek capital letter Φ. What sort of a sign is that you are writting?
George Islander LMAO I was wondering too, but he’s good doe I like his explanations
it represents the induced emf caused by the change in flux
Karl Hymers WOAH
Video Summary:
This video discusses Faraday's law of electromagnetic induction and Lenz's law, including the direction of induced current and the factors that affect it. It also covers the calculation of induced EMF and the use of transformers in changing voltage. Faraday's law is essential in understanding the principles behind electromagnetic induction and its various applications.
- 00:01 Moving a magnet into or away from a coil induces a current in the coil, with the direction of the current depending on the direction of movement.
- 12:46 The induced magnetic field in a loop is opposite in direction to the external magnetic field, and the current direction can be determined using the right-hand rule.
- 25:32 According to Lenz's law, the induced current in a circular wire will create a magnetic field that opposes the original magnetic field, meaning it will be in the opposite direction.
- 38:18 The video explains how to calculate induced EMF and current using Faraday's Law.
- 51:02 The video explains how to use Faraday's law of induction to calculate induced EMF and how to derive an equation for calculating the magnitude of induced EMF for a moving conductor in a magnetic field.
- 01:03:48 The magnetic force acting on a rod with current in the presence of a magnetic field is equal to the force required to keep it moving at that speed.
- 01:16:34 The video explains how to calculate current, voltage, and power in a transformer.
- 01:29:22 The video explains how to calculate the inductance of a solenoid and its potential energy.
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@7:40 don't you mean the magnetic flux?
Wonderfull video anyway.
What I don't understand is that if the coil is a magnetic material(And it has to be one) why isn't an opposite magnetic pole induced.
Or is it because we are pushing the magnet *into* the coil that something different happens i.e the current produced results in a different outcome.
Do you think you have made a mistake in 35:22?
nice brooo
Also why you used dark blue color in your graphics artwork was a bad choice. White or yellow would have been easier to see !
Go back and see the video to understand what I am saying.
Help us with a clap and bt 137 triac operations
what about magnetic induction???
You messed up the right thumb rule thing when you were doing the two example at about 20:00 in the video. Those two examples need to be reviewed sir.
Why is there a negative sign in the Induced E.M.F rule?
Cause according to lenz's law, the induced emf is in opposite direction to the flux that cause it
Honestly.. why do I pay tuition?
to graduate and get a degree. lol
26mirelka are you majoring in physiology?
Ikr
wrong question. it should be ''why do i learn this shit''
@@CanKorkmazTV because you need it as an engineer
Who else here is cramming before their Physics 2 exam? LOL.
me
This dude makes the difference between dropping out of and graduating college.
aw, lucky man, I gotta do this in high school so it's even harder
@@trice286 Me tooo
@@trice286 Why would high school be harder? Dont you take the same class for the entire 9 months of the schook year? Or is it different in where you live? College you take a class for a semester andgo to lecture at most 3 times a week
@@trice286 be thankful to have taken it in high school so in college it doesn't totally kick your ass
Born too late to explore the Earth.
Born too early to explore the universe.
Born just in time to watch your videos and kill the exam!
i don't have a better username Well now you can travel the world unlike before and can google universe information unlike before but i like your quote made me think..
+
fuck that fly
is no one gonna point out that this man's drawing of a hand wrapped around a wire was literally perfect
I swearrrr, when he started I thought 'what' but when he finished I was like 🤯
He probably has a degree in Art considering he knows so much subjects haha
Thank you very much for these videos. Not only they help me immensely to gather my thoughts, they are also quite ASMR.
You're an absolute legend. My Physics textbook's explanation of Lenz's Law is absolutely sub-par. I understood more by watching only the first 10 minutes of your explanation of Lenz's law than the whole chapter on my book dedicated to it.
man just hearing his voice is enough to understand
Agree
in the first 5 minutes you already cleared up so many confusions I had, you're incredible
Many times you say electric flux, shouldnt it be magnetic flux?
shut up
Yeah, Faraday's Law of Induction states that the induced EMF in a circuit is directly proportional to the rate of change of MAGNETIC flux. ΦB typically refers to magnetic flux and you'll see that used in the equation.
Alejandro Pasillas I think you need to shut up. So rude to insult someone for making an observation. Grow up kid
ok boomer
Yeah honest mistake 😂 got a little confused
Great explanation. I was out sick from school and I was completely in the dark with this chapter. You’ve been a big help
Same! It's very helpful.
Thank you very much. I was having such a hard time understanding this concept but now this makes sense. Thank you very much, Sir!
Where the subtitle ??? :'(... I am from Malaysia...so its hard to understand...but i love this video
I know this is an old video but you are amazing at teaching!! and so many exercises in this video. It is literally godsent
Simply superb. No words can explain his depth of knowledge.
anyone else watch these videos in 2 times or 1.5 times and got used to a high pitched voice, then are surprised when returning to normal speed to hear his voice?
That's me :D
only head his normal voice once and it was like somebody else talking. kinda weird to think he wouldn't sound x2 if i met him in real life
Oo never thought that way and you got a point haha
Kea leboga aubuti ( Setswana for "Thank you very much brother" )
You saved me there...
yoh facts!
Thank you so much for this video. I didn't understand Lenz law but you explained it very well , I have no doubts now :)
7th August 2022, 9:49 P.M.
If others are producing good graduates, this man is producing the scientists.
Can't believe he's taking out the time to enlighten the world. Love and respect from Pakistan ❤️
Guy my exams is tomorrow. I came today watch a one hour video, solve some past questions. And boom I'm moving out with an A in electromagnetic and modern physics
Any tips for physics 2 tests? I have one tomorrow and I swear I'm gonna fail.
Examples 28:18 and 29:03 are kind of confusing. The magnetic fields for each wire is on a different axis, I don't see how it does anything to oppose the other. Unless the circles are supposed to be along the same axis of the first wires magnetic field, which wasn't specified.
yea true. should have elaborated there
I really appreciate your videos. They have made my first year a little bit easier. Keep up the great work.
Ungowakwethu wena
You just saved my ass. I only had two hours to study for this exam.
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you made me understand this in 1hr 45min while my own teacher struggled with me for 10hrs plus, respect!
Thank you so much! my major is EE so please I need this kind of videos a lot.
You might find this video to be helpful:
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Thank you again!
Thank you so much for making these topics easier and interesting.🙂
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You're saving me. You teach better than my physics and orgo professors. They should just play your videos on class.
I love you
my teacher barely speaks English, I cannot understand him so I learn everything from you instead for free. thank you so much
KEEP EM COMIN!!!!
I watched this video last night and I thought it was confusing. Today I did some research and it seems like you could just say the following, "When current goes through a wire it creates a magnetic field. If you cut off the power, the collapsing magnetic field creates a voltage, that wants the current to keep going the same direction. Since it wants to keep going the same direction, the change in current turning off is a gradual change. Since coils create a bigger magnetic field, a bigger inductor makes the change in current flow slower." Isn't that the same thing?
You are like my favorite thing in all physics. Thank you for these videos.
honestly I LOVE YOU! thank you for explaining this saved my life! please make more!
I wish you had used standard or common variable names to represent electric flux. You are using capital I with a circle around I.
This is not standard usage which makes things more difficult to recall. It's bad enough to have intricate concepts to learn without adding tmo to he situation .
Just like in English language we have one symbol or name to refer to say for example "apple". Not many symbols or names for it because if we did keep changing the symbol for apple then much confusion and frustration would quickly result.
I noticed in science and engineering, teachers and authors often talk about or refer to the same concept but however, they adopt some symbol that they like and not use the common or standard symbol for that situation the teacher is discussing or writing a book about that concept but chose a new set of variable symbols.
This is harder to grasp for beginners but teachers keep doing this annoying thing.
It is done often in teaching and in new textbooks.
And you are doing this here with this video.
Nothing that I have seen in many years reading books on electricity uses capital I with a circle around it. For some reason you decided to start this.
I always use the screwing bottle cap rule to figure the direction of the magnetic field generated by the current. In wich way do you have to turn the cap to go in the way of the current? If you turn it to right it will go into the page and so on. Pretty cool rule if you ask me.
Great teacher. I love watching your Physics and Chemistry videos again and again and again. God bless you richly
goat
Thanks bro, it was quite helpful.
However I have a question. How can I use the equation given for calculating the Inductance, to calculate the inductance of a horizontally wounded coil for an Induction cooktop.
My confusion is on how to calculate the value of l(length).
On 47:57, shouldn't the current be negative? you divided -46.25 by 100, the answer is correct but should be negative. This would give you a negative energy at the very end which would explain why it is dissipated right? Thank you so much for making these videos, you're amazing and I always tell all my classmates to watch your videos, and my professor hates you because you explain things so much better!!!
You made me speechless by the way. You did save our lives bro
VOLUME OF YOUR VOICE IS TOO LOW
Hey dude, so what i understand in application to the transformer the current design on how they are winded are totally wrong because they have a clashing magnetic field and flux...am i right?
North away functions like a right hand screw. North towards, functions like a left handed screw.
Your very first equation. The Roman numeral one encased in a circle. Should be lower case oh with a vertical line spearing it.
I would like to think that he intentionally made the volume as low as possible
so the stupidly loud ads wakes me up
Absolutely wonderful video until about the hour mark. Absolutely obliterated my brain with your pronunciation of coulomb
Correlation between charge transfer and exchange coupling in carbon-based magnetic materials: aip.scitation.org/doi/citedby/10.1063/1.4933076
Excellent save.
This man is the reason I may pass my physics exam
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It's very impressive and logical explanation but self induction and mutual induction i don't understand it
can you please enable automatic translation to english? it helps me a lot
You're genuinely incredible. 7 year old video and you're saving my life!
Oh Lord help me to have all the knowledge of Science and put it to good use...
Super motivated or magnetized ?
Or both!?
I am both
i love you thanks for cool video . i want to become an engineer when i grow up. thanks for helping me
This guy and 3Blue1Brown are all you need to survive STEM courses.
super good!
Also check out this video on Current and the Conduction process th-cam.com/video/REsWdd76qxc/w-d-xo.html
Why did you make the print size so tiny on my screen ?
Is there a way for me to make it larger ?